SQL-DATABASE ERROR

Database error in WoltLab Burning Board (2.3.6): Invalid SQL: SELECT t.*, v.id AS isvoted FROM bb1_threads t LEFT JOIN bb1_votes v ON (v.id=t.threadid AND v.votemode=2 AND v.ipaddress='50.16.166.175') WHERE t.threadid = '4621'
mysql error: Unknown column 'v.votemode' in 'on clause'
mysql error number: 1054
mysql version: 4.0.27--maxd0-log
php version: 4.4.9
Date: 20.06.2013 @ 08:35
Script: /thread.php?postid=22402
Referer: